CAJ | 학술논문

洪水调查与评价能有效弥补当代遥感技术和传统统计插值技术获取资料的不足。以大沙河＂20100821＂暴雨为例,利用比降面积法监测水面比降为8‰,计算洪峰流量为1 830m3/s,平均流速2.47 m/s。分析1958年实测多峰洪水过程线,各峰涨落过程线基本平行,平行移动过程线拟化单峰过程线,根据拟化单峰过程线并五点概化,计算洪峰总量为1.09亿m3,径流系数0.84。文章根据本流域实测多峰洪水过程线拟化单峰过程线并五点概化,计算洪量结果合理,附近流域实测数据也证明径流系数大,说明该方法可用,具有推广价值。
홍수조사여평개능유효미보당대요감기술화전통통계삽치기술획취자료적불족。이대사하＂20100821＂폭우위례,이용비강면적법감측수면비강위8‰,계산홍봉류량위1 830m3/s,평균류속2.47 m/s。분석1958년실측다봉홍수과정선,각봉창락과정선기본평행,평행이동과정선의화단봉과정선,근거의화단봉과정선병오점개화,계산홍봉총량위1.09억m3,경류계수0.84。문장근거본류역실측다봉홍수과정선의화단봉과정선병오점개화,계산홍량결과합리,부근류역실측수거야증명경류계수대,설명해방법가용,구유추엄개치。
Straw adsorbent for heavy metal ion was prepared acid. The effects of etherification time, etherification temperature, by etherification modification with chloroacetic amounts of NaOH and chloroacetic acid on the weight percentage gain (WPG) of modified straw were investigated. The structure of modified straw was character- ized by infrared spectrometer. The experimental results show that the WPG of modified straw is 24.8% when the etherification time is 1.5 h, the etherification temperature is 70℃, the mass ratio of straw to NaOH is 1 : 1 and that of straw to chloroacetic acid is 1:0.5.